Quick definitions from WordNet (jack)▸ noun:male donkey▸ noun:any of several fast-swimming predacious fishes of tropical to warm-temperate seas▸ noun:tool for exerting pressure or lifting▸ noun:one of four face cards in a deck bearing a picture of a young prince▸ noun:small flag indicating a ship's nationality▸ noun:game equipment consisting of one of several small objects picked up while bouncing a ball in the game of jacks▸ noun:an electrical device consisting of a connector socket designed for the insertion of a plug▸ noun:a small worthless amount ("You don't know jack")▸ noun:immense East Indian fruit resembling breadfruit of; its seeds are commonly roasted▸ noun:someone who works with their hands; someone engaged in manual labor▸ noun:a man who serves as a sailor▸ verb:lift with a special device ("Jack up the car so you can change the tire")▸ verb:hunt with a jacklight▸ name: A male given name (very common: 1 in 317 males; popularity rank in the U.S.: #53)▸ name: A surname (common: 1 in 14285 families; popularity rank in the U.S.: #1852)▸ name: A female given name (rare: 1 in 100000 females; popularity rank in the U.S.: #3217)
▸ Word origin